The second theory that complements the above psychological intervention approaches is the self-determination theory. This theory contends that individuals and persons will pursue challenges that help them achieve one of the following needs  social interactions and associations  demonstration of competence, and  for self-determination (Anshel, 2006). Intrinsic and extrinsic motivations are identified as drivers for achievement behaviors and motivation by itself is seen as the degree of drive or desire through which individual approaches or even avoids certain actions. This case study supports that the self-determination theory and model has three phases or continuums. The first phase ‘amotivation’ which indicates the absence of motivation and push about an exercise. The second phase is extrinsic motivation which refers to the ability of the individual to engage in an exercise or a psychological program for the sole purpose of receiving an award or completely avoiding a punishment. Under this case, the external motivation stems from the client’s PTSD signs and symptoms like irritability, intense fear, and trauma, also difficulties in concentration and sleeping (ADAA, 2017). The third phase of the self-determination theory is intrinsic motivation which refers to the fact that an individual engages in a psychological program for the pleasure it provides or for its own sake. While both the CBT and the DBT psychological interventions are well-tailored for the needs of the client, self-determination is a classic theory to assist the client to undertake specific exercises advised by the psychiatrist. Although both interventions are geared to generate helpful talks that suppress the feeling of irritability and mental disturbances, the psychiatric will rely fundamentally on self-determination to ensure the client has the intrinsic and extrinsic motivation to pursue the recommended actions and the prescribed measures for fast recovery.